"Here's the truth: The guy said something about 'Roll Tide!' to Zach, and Zach turned around and said 'Good luck with that,'" owner Steve Ford told The Tennessean. "And the guy's buddy then sucker-punched Zach.

Employees working the door chased down the alleged puncher but no charges were filed by anyone involved.

"It is what it is and it's over. No one is pressing charges," Ford told The Tennessean. "It shouldn't have happened to begin with. The guy said 'Roll Tide.' He tried to provoke him. But Zach did not throw one punch, period. I was standing right next to him."

Mettenberger finished his career at LSU with a 19-6 record as a starter before being drafted in the sixth round of the 2014 NFL Draft. The Titans begin training camp on Friday.